Your friend may,however, warn you not to wear your heart on your sleeve.

VOA: special.2010.07.18

I don't have any more philosophical arguments up my sleeve on this issue.

我已两手空空，拿不出什么哲学论调了。

耶鲁公开课 - 死亡课程节选

But I very... I've been told I wear my heart on my sleeve.

但我很……有人说我很直白。

幸福的定义 - SpeakingMax英语口语达人

When your heart is on your sleeve you are showing your deepest emotions.

VOA: special.2010.07.18

But I know that my father wears his heart on his sleeve.

VOA: special.2010.05.02